Dry battery



July 13,1926.

1,592,361 w. F. HENDRY DRY BATTERY Filed Jdne 12', 1924 4!!!! 7 JQ\\\\\\\\\\\ I ATTORNEY ing tablets,

Patented July 13, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM I. HENDBY, OI OSSINING, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, '10 NATIONAL CARBON COMPANY, INC., OF. NEW YORK, N. Y., A CORPORATION OF nnw YORK.

DRY BATTERY.

Application filed June 12, 1934. Serial No. 719,808.

This invention relates to im rovements in dry cells and more particularl to multiple batteries in which the indivi ual cells are connected in parallel with each other.

In my copending application Serial No. 654,613, filed Jul 30, 1923, a dry cell structure is describe in which a plurality of compacted tablets are combined into a dry battery having a common carbon electrode and a plurality of zinc electrodes, the latter being provided in the form of discs or washers between superimposed tablets. The zinc discs are interconnected by means of a single container enclosing the whole assembly and in which the discs are frictionally held. In order .to insure the thorough soakin of the whole structure and particularly t e linings surrounding the depolarizin accordance with the present invention the zinc discs are perforated to permit the ready passage of liquid down to the lowest part of the battery and, furthermore, the zinc discs are corrugated so that channels are formed above and below each compacted tablet through. which the liquid is readily distributed throughout the structure. The advantage of providing grooves or corrugations inthe zinc washers rather than in the tablets resides mainly in the fact that the manufacturing process is improved because grooved tablets break more easily than plain tablets, and grooves in tablets are more easily stopped up than in the zinc washers. I

The invention will be more clearly understood from the following detailed description of a preferred embodiment.

In the drawings, Fig. 1 is a vertical crosssection of a battery assembled in accordance with the present invention; Fig. 2 is a to View of a zinc washer; and Fig. 3 is a si e elevation of such washer.

Referring now to the drawings, 1 is a zinc can the bottom of which is covered with a disc 2 of paper or other insulating material. On top of this disc, in successive layers, zinc disc 3 and compacted depolarizing tablets 4 are provided, each de olarizing tablet 4 being wrapped or ot erwise coated with a layer of porous cellulose maperforations provided in the tablets 4 and V in the zinc washers 3. The perforations in the zinc washers are large enough to clear the carbon electrode 7 so as to avoid short circuits.

The zinc washer 3, as clearly shown in Figs. 2 and 3, is radially corrugated, which corrugations provide radial passageways for liquid that seeps down adjacent to the carbon electrode 7. Furthermore, in bending up the rim 6 the corrugated zinc splits at the ridges and these split portions are enlarged, by means of a suitable corrugated die, into holes 8 through which the liquid will find read access to the lower tablets.

What I cla1m is:

1. In a dry battery, a plurality of tablets compacted of depolarizing mixture, a zinc container for said tablets, zinc discs separating adjacent tablets and contacting with said container, and grooves and perforations in each disc. i

2. In a dry battery, a plurality of tablets compacted of depolarizing mixture, an absorbent insulatin lining surrounding each tablet, a carbon e ectrode projecting through said tablets, a zinc container surrounding said tablets, and corrugated zinc washers separating said tablets and contacting with said zinc container.

3. In a dry battery, a plurality of tablets compacted of depolarizing mixture, an absorbent insulating lining surrounding each tablet, a carbon e ectrode projecting through said tablets, a zinc container surrounding said tablets, and rforated zinc washers separating said ta lets and contacting with said zinc container.

4. In a dry battery, a plurality of tablets compacted of depolarizing mixture, at lining of cellulose absorbent material surrounding each tablet, a carbon electrode projecting through said tablets, a zinc container elecgaging said zinc container, and a plurality of trode surrounding said tablets, zinc discs perforations. separating adjacent tablets; each of said In testimony whereof, I have signed my zinc discs being provided with a central name to this specification this 10th day of perforation clearing said carbon electrode, June 1924.

corrugations radiating from said central perforation, an upturned rim frictionally en- WILLIAM F. HENDRY. 

